I will add to @arbaman’s great answer that if you are going to be doing board level repairs as a business (or serious hobby/sideline), I think you should be investing some time and effort to understand at least the basics of electronics. Once you understand what a resistor, capacitor or inductor (coil, choke, ferrite bead) does and how they behave, you will know how to test them and whether or not it can be shorted or removed. As I always say, electronics engineers put those specific components there for a reason so ideally you should always be replacing them with similarly spec'd components.
This is a [https://www.allaboutcircuits.com/technical-articles/clean-power-for-every-ic-part-1-understanding-bypass-capacitors/|good tutorial on how engineers deliver clean power to IC's]. This is very relevant as the majority of the passives on an iDevice logic board are there for this specific reason. There are several articles in the series and they touch on capacitors and ferrite beads (filters). Another good source of materials is [http://www.electronics-tutorials.ws/|ElectronicTutorials]. There are also some good youtube channels such as Afrotechmods, AddOhms and of course the EEVBlog.
I will add to @arbaman’s great answer that if you are going to be doing board level repairs as a business (or serious hobby/sideline), I think you should be investing some time and effort to understand at least the basics of electronics. Once you understand what a resistor, capacitor or inductor (coil, choke, ferrite bead) does and how they behave, you will know how to test them and whether or not it can be shorted or removed. As I always say, electronics engineers put those specific components there for a reason so ideally you should always be replacing them with similarly spec'd components.
This is a [https://www.allaboutcircuits.com/technical-articles/clean-power-for-every-ic-part-1-understanding-bypass-capacitors/|good tutorial on how engineers deliver clean power to IC's]. This is very relevant as the majority of the passives on an iDevice logic board are there for this specific reason. There are several articles in the series and they touch on capacitors and ferrite beads (filters). Another good source of materials is [http://www.electronics-tutorials.ws/|ElectronicTutorials]. There are also some good youtube channels such as Afrotechmods, AddOhms and of course the EEVBlog.
I will add to @arbaman’s great answer that if you are going to be doing board level repairs as a business (or serious hobby/sideline), I think you should be investing some time and effort to understand at least the basics of electronics. Once you understand what a resistor, capacitor or inductor (coil, choke, ferrite bead) does and how they behave, you will know how to test them and whether or not it can be shorted or removed. As I always say, electronics engineers put those specific components there for a reason so ideally you should always be replacing them with similarly spec'd components.
This is a [https://www.allaboutcircuits.com/technical-articles/clean-power-for-every-ic-part-1-understanding-bypass-capacitors/|good tutorial on how engineers deliver clean power to IC's]. This is very relevant as the majority of the passives on an iDevice logic board are there for this specific reason. There are several articles in the series and they touch on capacitors and ferrite beads (filters). Another good source of materials is [http://www.electronics-tutorials.ws/|ElectronicTutorials]. There are also some good youtube channels such as Afrotechmods, AddOhms and of course the EEVBlog.